— Who helped you clean the bedroom yesterday, Kitty?— _______. I cleaned it all by myself.
A:Somebody
B:Everybody
C:Nobody
D:Anybody
①大道之行,天下为公 ②己欲立而立人,己欲达而达人
③知人者智,自知者明 ④先天下之忧而忧,后天下之乐而乐